Read Time:15 Second 更新一個已知名稱的 Python package，如 numpy package pip install -U numpy 或是 pip install --upgrade numpy 更新所有已安裝的packages pip list |awk '{print $1}' |xargs -n 1 pip install --upgrade 或是 for i in `pip list |awk '{print $1}'`; do echo $i; pip install --upgrade